20412340440 has 64 divisors (see below), whose sum is σ = 61290639360. Its totient is φ = 5438524800.

The previous prime is 20412340409. The next prime is 20412340441. The reversal of 20412340440 is 4404321402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20412340440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20412340441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64227 + ... + 212013.

It is an arithmetic number, because the mean of its divisors is an integer number (957666240).

Almost surely, 2^20412340440 is an apocalyptic number.

20412340440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20412340440 is an abundant number, since it is smaller than the sum of its proper divisors (40878298920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20412340440 is a wasteful number, since it uses less digits than its factorization.

20412340440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148952 (or 148948 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20412340440 its reverse (4404321402), we get a palindrome (24816661842).

The spelling of 20412340440 in words is "twenty billion, four hundred twelve million, three hundred forty thousand, four hundred forty".